2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef included_acl_h
16 #define included_acl_h
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/l2/l2_output.h>
23 #include <vppinfra/hash.h>
24 #include <vppinfra/error.h>
25 #include <vppinfra/bitmap.h>
26 #include <vppinfra/elog.h>
27 #include <vppinfra/bihash_48_8.h>
28 #include <vppinfra/bihash_40_8.h>
31 #include "hash_lookup_types.h"
33 #define ACL_PLUGIN_VERSION_MAJOR 1
34 #define ACL_PLUGIN_VERSION_MINOR 3
36 #define UDP_SESSION_IDLE_TIMEOUT_SEC 600
37 #define TCP_SESSION_IDLE_TIMEOUT_SEC (3600*24)
38 #define TCP_SESSION_TRANSIENT_TIMEOUT_SEC 120
40 #define ACL_FA_DEFAULT_HEAP_SIZE (2 << 29)
42 #define ACL_PLUGIN_HASH_LOOKUP_HEAP_SIZE (2 << 25)
43 #define ACL_PLUGIN_HASH_LOOKUP_HASH_BUCKETS 65536
44 #define ACL_PLUGIN_HASH_LOOKUP_HASH_MEMORY (2 << 25)
46 extern vlib_node_registration_t acl_in_node;
47 extern vlib_node_registration_t acl_out_node;
49 void input_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
50 void output_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
53 ACL_TIMEOUT_UDP_IDLE = 0,
55 ACL_TIMEOUT_TCP_TRANSIENT,
60 enum address_e { IP4, IP6 };
82 u16 src_port_or_type_first;
83 u16 src_port_or_type_last;
84 u16 dst_port_or_code_first;
85 u16 dst_port_or_code_last;
96 ip46_address_t src_ip_addr;
114 macip_acl_rule_t *rules;
115 /* References to the classifier tables that will enforce the rules */
122 * An element describing a particular configuration fo the mask,
123 * and how many times it has been used.
129 } ace_mask_type_entry_t;
132 /* mheap to hold all the ACL module related allocations, other than hash */
136 /* API message ID base */
139 acl_list_t *acls; /* Pool of ACLs */
140 hash_acl_info_t *hash_acl_infos; /* corresponding hash matching housekeeping info */
141 clib_bihash_48_8_t acl_lookup_hash; /* ACL lookup hash table. */
142 u32 hash_lookup_hash_buckets;
143 u32 hash_lookup_hash_memory;
145 /* mheap to hold all the miscellaneous allocations related to hash-based lookups */
146 void *hash_lookup_mheap;
147 u32 hash_lookup_mheap_size;
148 int acl_lookup_hash_initialized;
149 applied_hash_ace_entry_t **input_hash_entry_vec_by_sw_if_index;
150 applied_hash_ace_entry_t **output_hash_entry_vec_by_sw_if_index;
151 applied_hash_acl_info_t *input_applied_hash_acl_info_by_sw_if_index;
152 applied_hash_acl_info_t *output_applied_hash_acl_info_by_sw_if_index;
154 macip_acl_list_t *macip_acls; /* Pool of MAC-IP ACLs */
156 /* ACLs associated with interfaces */
157 u32 **input_acl_vec_by_sw_if_index;
158 u32 **output_acl_vec_by_sw_if_index;
160 /* interfaces on which given ACLs are applied */
161 u32 **input_sw_if_index_vec_by_acl;
162 u32 **output_sw_if_index_vec_by_acl;
164 /* Total count of interface+direction pairs enabled */
165 u32 fa_total_enabled_count;
167 /* Do we use hash-based ACL matching or linear */
168 int use_hash_acl_matching;
170 /* a pool of all mask types present in all ACEs */
171 ace_mask_type_entry_t *ace_mask_type_pool;
174 * Classify tables used to grab the packets for the ACL check,
175 * and serving as the 5-tuple session tables at the same time
177 u32 *acl_ip4_input_classify_table_by_sw_if_index;
178 u32 *acl_ip6_input_classify_table_by_sw_if_index;
179 u32 *acl_ip4_output_classify_table_by_sw_if_index;
180 u32 *acl_ip6_output_classify_table_by_sw_if_index;
182 /* MACIP (input) ACLs associated with the interfaces */
183 u32 *macip_acl_by_sw_if_index;
185 /* bitmaps when set the processing is enabled on the interface */
186 uword *fa_in_acl_on_sw_if_index;
187 uword *fa_out_acl_on_sw_if_index;
188 /* bihash holding all of the sessions */
189 int fa_sessions_hash_is_initialized;
190 clib_bihash_40_8_t fa_sessions_hash;
191 /* The process node which orcherstrates the cleanup */
192 u32 fa_cleaner_node_index;
193 /* FA session timeouts, in seconds */
194 u32 session_timeout_sec[ACL_N_TIMEOUTS];
195 /* total session adds/dels */
196 u64 fa_session_total_adds;
197 u64 fa_session_total_dels;
199 /* L2 datapath glue */
201 /* next indices within L2 classifiers for ip4/ip6 fa L2 nodes */
202 u32 l2_input_classify_next_acl_ip4;
203 u32 l2_input_classify_next_acl_ip6;
204 u32 l2_output_classify_next_acl_ip4;
205 u32 l2_output_classify_next_acl_ip6;
206 /* next node indices for L2 dispatch */
207 u32 fa_acl_in_ip4_l2_node_feat_next_node_index[32];
208 u32 fa_acl_in_ip6_l2_node_feat_next_node_index[32];
209 u32 fa_acl_out_ip4_l2_node_feat_next_node_index[32];
210 u32 fa_acl_out_ip6_l2_node_feat_next_node_index[32];
212 /* EH values that we can skip over */
213 uword *fa_ipv6_known_eh_bitmap;
215 /* whether to match L4 ACEs with ports on the non-initial fragment */
216 int l4_match_nonfirst_fragment;
218 /* conn table per-interface conn table parameters */
219 u32 fa_conn_table_hash_num_buckets;
220 uword fa_conn_table_hash_memory_size;
221 u64 fa_conn_table_max_entries;
224 * If the cleaner has to delete more than this number
225 * of connections, it halves the sleep time.
228 #define ACL_FA_DEFAULT_MAX_DELETED_SESSIONS_PER_INTERVAL 100
229 u64 fa_max_deleted_sessions_per_interval;
232 * If the cleaner deletes less than these connections,
233 * it increases the wait time by the "increment"
236 #define ACL_FA_DEFAULT_MIN_DELETED_SESSIONS_PER_INTERVAL 1
237 u64 fa_min_deleted_sessions_per_interval;
239 #define ACL_FA_DEFAULT_CLEANER_WAIT_TIME_INCREMENT 0.1
240 f64 fa_cleaner_wait_time_increment;
242 u64 fa_current_cleaner_timer_wait_interval;
244 int fa_interrupt_generation;
246 /* per-worker data related t conn management */
247 acl_fa_per_worker_data_t *per_worker_data;
249 /* Configured session timeout */
250 u64 session_timeout[ACL_N_TIMEOUTS];
253 /* Counters for the cleaner thread */
255 #define foreach_fa_cleaner_counter \
256 _(fa_cleaner_cnt_delete_by_sw_index, "delete_by_sw_index events") \
257 _(fa_cleaner_cnt_delete_by_sw_index_ok, "delete_by_sw_index handled ok") \
258 _(fa_cleaner_cnt_unknown_event, "unknown events received") \
259 _(fa_cleaner_cnt_timer_restarted, "session idle timers restarted") \
260 _(fa_cleaner_cnt_wait_with_timeout, "event wait with timeout called") \
261 _(fa_cleaner_cnt_wait_without_timeout, "event wait w/o timeout called") \
262 _(fa_cleaner_cnt_event_cycles, "total event cycles") \
263 /* end of counters */
264 #define _(id, desc) u32 id;
265 foreach_fa_cleaner_counter
269 vlib_main_t * vlib_main;
270 vnet_main_t * vnet_main;
273 #define foreach_acl_eh \
274 _(HOPBYHOP , 0 , "IPv6ExtHdrHopByHop") \
275 _(ROUTING , 43 , "IPv6ExtHdrRouting") \
276 _(DESTOPT , 60 , "IPv6ExtHdrDestOpt") \
277 _(FRAGMENT , 44 , "IPv6ExtHdrFragment") \
278 _(MOBILITY , 135, "Mobility Header") \
279 _(HIP , 139, "Experimental use Host Identity Protocol") \
280 _(SHIM6 , 140, "Shim6 Protocol") \
281 _(EXP1 , 253, "Use for experimentation and testing") \
282 _(EXP2 , 254, "Use for experimentation and testing")
286 "No Next Header" is not a header.
287 Also, Fragment header needs special processing.
289 _(NONEXT , 59 , "NoNextHdr") \
292 ESP is hiding its internal format, so no point in trying to go past it.
294 _(ESP , 50 , "EncapsulatingSecurityPayload") \
297 AH has a special treatment of its length, it is in 32-bit words, not 64-bit words like the rest.
299 _(AUTH , 51 , "Authentication Header") \
306 #define _(N, v, s) ACL_EH_##N = v,
313 extern acl_main_t acl_main;